body {
  background: #fff;
  font-family: arial;
}
/* 头部 header */
#header {
  background: #ff841d;
}
/* 主题 main */
.site-nav {
  overflow: hidden;
}
.site-nav .link {
  width: 7.5rem;
  min-width: 170px;
  margin: 0.25rem auto;
}
.site-nav .link a {
  padding: 0.25rem 0.2rem;
  background: #f4f4f4;
  float: left;
  margin: 0 0 0.125rem 0.125rem;
  border: 1px solid #bfbfbf;
  color: #000;
  font-size: 0.4rem;
}
.site-nav .link a img {
  margin-right: 0.125rem;
  display: inline;
  vertical-align: middle;
  width: 0.4rem;
  height: 0.4rem;
}
